ok guys so I got mine...and well...it didn't fit. I DO NOT BLAME the seller. As I have a custom bumper that was for my 335 to look like the M3. And I think this is where the problem lay I'm really bummed about it, but I'm glad I didn't spend $1800 on one. So needless to say I'm will be selling this diffuser. I'm going to try and test fit it on a local guys M3 and see if there is a difference. If it fits his and he doesn't want it...then it'll be for sale

ok guys so I got mine...and well...it didn't fit. I DO NOT BLAME the seller. As I have a custom bumper that was for my 335 to look like the M3. And I think this is where the problem lay I'm really bummed about it, but I'm glad I didn't spend $1800 on one. So needless to say I'm will be selling this diffuser. I'm going to try and test fit it on a local guys M3 and see if there is a difference. If it fits his and he doesn't want it...then it'll be for sale

Mine fitted easily on the M3. The only thing was it has a 1/4" separation in the right side from the bumper. But that happens also with the $1,800 Vorsteiner.

Picked one of these up from 4A but couldn't get the fitment right. I got gaps on both top edges. Are you guys bolting first and then taping or vice versa? Seems once I have it bolted, the edges won't sit flush.